Supplier Spotlight

Video Exclusives

Mercedes-Benz unveils its revamped G-Class

gtr

The all-new G-Class makes its public debut at the Detroit auto show in G550 form. Completely redeveloped and fitted with a 4.0-liter V8 biturbo gasoline engine offering 427ps and 450 lb-ft of torque at 2,000rpm to 4,750rpm, despite near-identical looks to its predecessor plenty has changed for the Mercedes-Benz SUV.


Ford’s F150 pickup gets its first diesel motor

gtr

Developed by the powertrain team behind the 6.7-liter Power Stroke engine for super duty trucks, the all-new 3.0-liter V6 Power Stroke unit promises 250ps, 440 lb-ft of torque, and an anticipated 5175kg of towing capacity.


Click here/on image to watch video

In light of Fisker's solid-state battery breakthrough and claims of a one minute charge time, will this electric vehicle technology development kick-start mass BEV uptake? 

News

Toyota develops all-new exhaust system catalyst

Toyota Motor Corporation has announced the commercial availability of a new, smaller catalyst that uses 20% less precious metal in approximately 20% less volume, while maintaining the same exhaust gas purification performance. The design is the world’s first integrally-molded Flow Adjustable Design Cell (FLAD) substrate, with a different cell cross-sectional area at the inner portion compared to that at the outer portion. Innovative design and manufacturing technologies have allowed for the mass production of the new catalyst, which will gradually be installed in new vehicle models, starting from the Lexus LC500h later this year.

Increased usage of catalytic precious metals to clean exhaust gas and reduce air pollution presents many issues, including increased costs and resource depletion. Toyota has conducted extensive research and development into finding solutions to help improve the purification efficiency of catalytic precious metals, such as finding the optimal substrate shape and length, as well as modifying the cell wall thickness and cross-sectional area. Other R&D efforts include selectively washcoating precious metals and other catalytic materials, and changing catalytic substrate cell density in line with exhaust gas flows.

Toyota and Denso Corporation have developed this new FLAD® substrate to improve the uniformity of exhaust gas flow. Through a series of validations using simulations and prototype substrates, both companies have succeeded in improving uniformity of exhaust gas flow within the catalyst by optimizing factors such as the ratios of cross-sectional areas of cells at the inner and outer portions, and their corresponding densities. As such, with this development, approximately 20 percent less precious metal is used in a more compact catalyst that contains approximately 20 percent less volume, while maintaining the same exhaust gas purification performance as that of conventional catalysts. The newly developed innovative design and manufacturing technologies have also allowed for the mass production of the world’s first integrally molded catalyst.

Currently, the most commonly used substrate in exhaust gas purifying catalysts for gasoline engines is made of ceramic (cordierite), which utilizes a honeycomb structure consisting of square or hexagonal cells. The walls of cells within this substrate are washcoated with catalytic materials, like platinum (Pt), rhodium (Rh), palladium (Pd) and other precious metals. This provides a catalytic effect, where through oxidation-reduction, harmful gases such as carbon monoxide (CO), unburned hydrocarbons (HC), and nitrogen oxide (NOx) are purified within the exhaust to help make them safe.

While conventional catalysts have a uniform cell cross-sectional area, the newly developed FLAD substrate has a structure with a different cell cross-sectional area at the inner portion compared to that at the outer portion. Toyota has succeeded in mass producing this substrate with the world’s first design and manufacturing technology that is able to integrally mold the catalyst.

Uniform exhaust gas flow within the catalysts installed in exhaust pipes enables the washcoated precious metals and other catalytic materials to effectively purify the exhaust gas. However, the use of conventional substrates with uniform cell cross-sectional area results in an unbalanced flow of exhaust gas because the flow of gas through the inner portion of the catalyst is faster, and at a higher volume than that through the outer portion. As a result, more catalytic precious metal is required at the inner portion of the catalyst, where the flowrate is greater, in order to maintain purification performance. Current catalytic material washcoating technologies require all cell walls to be coated equally during the washcoating process, so parts of the catalyst with a lower exhaust gas flowrate are coated with the same amount of catalytic precious metals as those parts which have a higher flowrate.

19 February 2017


RECEIVE THE
LATEST NEWS


Your email address:





Read Latest Issue
International Engine of the Year Awards
Read Latest Issue

Web Exclusive Articles

Hyundai 2019 Veloster N: The Knowledge
Designed specifically for the US market and officially unveiled at the 2018 Detroit auto show this month, Hyundai’s 2.0-liter turbocharged Veloster N has been developed to deliver driveability rather than outright performance statistics.
Read Now

Renault Trucks reveals how mixed reality can improve engine quality control
Renault Trucks, in collaboration with Immersion, is evaluating the potential of mixed reality to deliver a new, faster and more reliable quality control process at its Lyon engine manufacturing site.
Read Now

BAIC Motor on the industry’s fuel economy performance ambitions
BAIC has teamed up with Siemens to implement vehicle energy management and model-based systems engineering as the Chinese OEM works towards optimal fuel efficiency
Read Now

Read Latest Issue

Supplier Spotlight

Supplier SpotlightClick here for listings and information on leading suppliers covering all aspects of the engine technology industry. Want to see your company included? Contact aboobaker.tayub@ukimediaevents.com for more details.

Submit your industry opinion

Industry BlogDo you have an opinion you'd like to share with the engine technology community? We'd like to hear your views and opinions on the leading issues shaping the industry. Share your comments by sending up to 500 words to d.slavnich@ukimediaevents.com

Submit Your Recruitment Ad

Recruitment AdTo send us your recruitment advertising or to receive information on placing a banner please email aboobaker.tayub@ukimediaevents.com